Space and astronomy news dominated by U.S.-China rivalry over telescope projects, NASA's Artemis astronauts engaging with public, Pentagon UFO file releases, and discovery of atmosphere around distant mini-Pluto.

U.S.-China tension escalates over South American astronomy as the U.S. pressures Argentina and Chile to review two Chinese telescope projects in the Andean deserts, with astronomers concerned about potential setbacks to research collaboration.

NASA's Artemis II mission astronauts answered questions from children about their space journey, including details about food and experiences during the mission, engaging the public in space exploration.

The Pentagon released previously unseen files on unidentified flying objects dating back decades, though initial images remain unclear; the government indicated more files would be released on a rolling basis.

Astronomers discovered surprising signs of a thin atmosphere around a distant mini-Pluto billions of miles away, detected through gradual dimming and brightening patterns as a star passed behind it.

NASA deployed powerful radar systems to track Mexico City's subsidence, which is sinking up to 2 centimeters monthly, providing new data to address this geological crisis.

A deadly hantavirus outbreak on a cruise ship raised questions about contact-tracing app effectiveness, with experts noting these tools are less helpful for smaller, localized outbreaks compared to large pandemic scenarios.

Delivery drones are now flying over New York City's crowded airspace, representing a new phase of urban aviation technology deployment despite uncertainty about long-term feasibility.

Scientists harnessed bioluminescent algae's blue glow for innovative applications, suggesting the organisms could be embedded in biosensors that glow when environmental toxins are detected.

Sir David Attenborough celebrated his 100th birthday, marking a century of influence on natural history broadcasting and public understanding of the natural world.